We are investigating the photophysical properties of new chiral cationic polyaromatic molecules, synthesised in the group of Prof. Jérôme Lacour in Geneva, that could have promising applications as NIR fluorescent probes. The redox properties of these chiral fluorophores make them ideally suited for investigating chiral selectivity in photoinduced electron transfer (ET) reactions.
The figure on the left shows the early fluorescence quenching dynamics of one of these chiral molecules by an achiral aromatic amine, the fast initial decay pointing to ultrafast ET. The figure on the right shows Stern-Volmer plots for the ET quenching of an enantiopure fluorophore by the two enantiomers of a chiral donor. Substantial difference can be observed.
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Physical Chemistry Department - Sciences II - University of Geneva
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